mirror of
https://github.com/Idov31/NovaHypervisor
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idov31
95 lines
1.3 KiB
NASM
95 lines
1.3 KiB
NASM
PUBLIC AsmGetLdtr
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PUBLIC AsmGetGdtBase
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PUBLIC AsmGetIdtBase
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PUBLIC AsmGetGdtLimit
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PUBLIC AsmGetIdtLimit
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PUBLIC AsmReloadGdtr
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PUBLIC AsmReloadIdtr
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.code _text
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AsmGetLdtr PROC
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sldt rax
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ret
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AsmGetLdtr ENDP
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AsmGetGdtBase PROC
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LOCAL gdtr[10]:BYTE
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sgdt gdtr
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mov rax, QWORD PTR gdtr[2]
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ret
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AsmGetGdtBase ENDP
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AsmGetIdtBase PROC
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LOCAL idtr[10]:BYTE
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sidt idtr
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mov rax, QWORD PTR idtr[2]
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ret
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AsmGetIdtBase ENDP
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AsmGetGdtLimit PROC
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LOCAL gdtr[10]:BYTE
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sgdt gdtr
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mov ax, WORD PTR gdtr[0]
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ret
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AsmGetGdtLimit ENDP
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AsmGetIdtLimit PROC
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LOCAL idtr[10]:BYTE
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sidt idtr
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mov ax, WORD PTR idtr[0]
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ret
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AsmGetIdtLimit ENDP
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;
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; Description:
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; AsmReloadGdtr is responsible for reloading gdt.
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;
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; Parameters:
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; @GdtBase [PVOID] -- Gdt base.
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; @GdtLimit [UINT32] -- Gdt limit.
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;
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; Returns:
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; @gdt [PVOID] -- New gdt.
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;
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AsmReloadGdtr PROC
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push rcx
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shl rdx, 48
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push rdx
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lgdt fword ptr [rsp+6]
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pop rax
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pop rax
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ret
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AsmReloadGdtr ENDP
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;
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; Description:
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; AsmReloadIdtr is responsible for reloading idt.
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;
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; Parameters:
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; @IdtBase [PVOID] -- Idt base.
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; @IdtLimit [UINT32] -- Idt limit.
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;
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; Returns:
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; @idt [PVOID] -- New idt.
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;
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AsmReloadIdtr PROC
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push rcx
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shl rdx, 48
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push rdx
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lidt fword ptr [rsp+6]
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pop rax
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pop rax
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ret
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AsmReloadIdtr ENDP
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END |